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A 6" brass nipple odd the pump before
the GALVY Pipe would also stop electrolysis . I think Rick or Phoebe taught Me this.

I"m not sure about that. I know years ago, Red Jacket pumps came with an 1-1/4" Nylon bushing. That separated the Galvy from the Pump which could have been Stainless or Cast Iron. That stopped the galvanic action. I guess that's what Dielectric Unions are all about.